Fig. 4: Experimental validation of sPSF-MOE for binary objects with CR of 12.

a The experimental setup for multi-object encryption and decryption is illustrated. A phase-modulating spatial light modulator (SLM) is used to encode objects, which are then passed through a beam splitter (BS) and focused onto a CCD camera for detection. The SLM pattern and the corresponding intensity distribution are shown, demonstrating the relationship between the encoded phase and the captured intensity. insets: A representative SLM pattern for the circular sPSF and CMOS intensity of the compressed ciphertext; b The first row shows simulated sPSF patterns, while the second row shows the experimental sPSF patterns generated using the LPR algorithm. The simulated and experimental results are in good agreement, demonstrating the successful generation of sPSF; c The figure displays the encrypted image obtained by convolving the plaintext with the corresponding sPSF, plaintext information is almost invisible after encryption; d The final panel shows the result of the reconstruction using the PC algorithm, successfully retrieving the original information from the encrypted image. LED light-emitting diode, F filter, P polarizer, DMD digital micromirror device, CMOS complementary metal oxide semiconductor.